What is the correct answer?


If three forces acting in one plane upon a rigid body, keep it in equilibrium, then they must either

A. Meet in a point

B. Be all parallel

C. At least two of them must meet

D. All the above are correct

Correct Answer :

D. All the above are correct

Related Questions

Which of the following is the locus of a point that moves in such a manner… If tension in the cable supporting a lift moving downwards is half the… The term 'Centroid' is Which of the following is an equation of linear motion? (where, u and… In order to determine the effects of a force, acting on a body, we must… Three forces acting on a rigid body are represented in magnitude, direction… The centre of percussion of a solid cylinder of radius r resting on a… Which of the following is not the unit of power? The unit of angular acceleration is A framed structure is perfect, if the number of members are __________… A weight of 1000 N can be lifted by an effort of 80 N. If the velocity… A framed structure is perfect if it contains members equal to The algebraic sum of the resolved parts of a number of forces in a given… Two non-collinear parallel equal forces acting in opposite direction During elastic impact, the relative velocity of the two bodies after impact… A projectile is fired at an angle θ to the vertical. Its horizontal… The total motion possessed by a body, is called A rubber ball is dropped from a height of 2 m. If there is no loss of… In a framed structure, as shown in the below figure, the force in the… A pair of smith's tongs is an example of the lever of The force induced in the string AB due to the load W, as shown in the… The possible loading in various members of framed structures are The centre of gravity a T-section 100 mm × 150 mm × 50 mm… The moment of inertia of a thin disc of mass m and radius r, about an… A couple produces If n = number of members and y = number of joints, then for a perfect… The velocity of a particle (v) moving with simple harmonic motion, at… In a framed structure, as shown in the below figure, the force in the… The centre of gravity of a semi-circle lies at a distance of __________… The unit of power in S.I. units is